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Branched oligoarylsilanes and synthesis method thereof. RU patent 2396290.

FIELD: chemistry.

SUBSTANCE: invention relates to novel branched oligoarylsilanes and their synthesis method. The engineering problem is obtaining branched oligoarylsilanes which contain not less than 5 functional arylsilane links and have a set of properties which enable their use as luminescent materials. The disclosed branched oligoarylsilanes have general formula where R denotes a substitute from: straight or branched C₁-C₂₀ alkyl groups; straight or branched C₁-C₂₀ alkyl groups separated by at least one oxygen atom; straight or branched C₁-C₂₀ alkyl groups separated by at least one sulphur atom; branched C₃-C₂₀ alkyl groups separated by at least one silicon atom; C₂-C₂₀ alkenyl groups; Ar denotes identical or different arylene or heteroarylene radicals selected from: substituted or unsubstituted thienyl-2,5-diyl, substituted or unsubstituted phenyl-1,4-diyl, substituted or unsubstituted 1,3-oxazole-2,5-diyl, substituted fluorene-4,4'-diyl, substituted cyclopentadithiophene-2,7-diyl; Q is a radical selected from the same group as Ar; X is at least one radical selected from the same group as Ar and/or a radical selected from: 2,1,3-benzothiodiazole-4,7-diyl, anthracene-9,10-diyl, 1,3,4-oxadiazole-2,5-diyl, 1-phenyl-2-pyrazoline-3,5-diyl, perylene-3,10-diyl; L equals 1 or 3 or 7 and preferably 1 or 3; n is an integer from 2 to 4; m is an integer from 1 to 3; k is an integer from 1 to 3. The method of obtaining branched oligoarylsilanes involves reaction of a compound of formula where Y is a boric acid residue or its ester or Br or I, under Suzuki reaction conditions with a reagent of formula (IV) A - X_m - A (IV), where A denotes: Br or I, provided that Y denotes a boric acid residue or its ester; or a boric acid residue or its ester, provided that Y denotes Br or I.

EFFECT: obtaining novel compounds distinguished by high luminescence efficiency, efficient intramolecular transfer of energy between molecule fragments and high thermal stability.

24 cl, 12 dwg, 1 tbl, 11 ex

IPC classes for russian patent Branched oligoarylsilanes and synthesis method thereof. RU patent 2396290. (RU 2396290):

C09K11/06 - containing organic luminescent materials

C08G77/60 - in which all the silicon atoms are connected by linkages other than oxygen atoms

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